A new study out of the University of Texas found that the small quakes started happening after there were large amounts of CO2 and other gases injected underground to boost oil production.
The study says that the Cogdell oil field, which is north of Snyder, has these gas-injection wells. And, many of the earthquakes reported in that area have been north of Snyder.
According to the study, a total of 93 earthquakes stronger than magnitude one-point-five have hit the Cogdell area between March 2009 and December 2010, so that number is not counting the more than a dozen others that have happened since then.
The study found that there was a positive correlation between the amount of gas that was injected underground, to the number of quakes in the area.
However, researchers did say similar amounts of CO2 injections under ground in other parts of the world did not cause quakes.